Ecophysiology of caatinga native species under semi-arid conditions

Authors

  • Alessandro Carlos Mesquita Universidade do Estado da Bahia
  • Barbara França Dantas Embrapa Semiárido
  • Paulo Araquém Ramos Cairo Universidade Estadual do Sudoeste da Bahia

DOI:

https://doi.org/10.14393/BJ-v34n6a2018-39889

Keywords:

photosynthesis, plant-water relationship, drought, brazilian semiarid.

Abstract

Caatinga is a biome from the Brazilian northeastern semiarid region which needs further studies for the preservation of its native species. The aim of this study was to evaluate the physiological behavior of six native species. The experiment was arranged in six treatments (native species) and three replicates in a randomized block design. Net photosynthesis, transpiration, stomatal conductance, photosynthetic photon flux density, chlorophyll content, and soil moisture were evaluated. According to the results, Mimosa spp. had the lowest levels of chlorophyll content. In all species, water deficit caused significant decrease in transpiration rate and stomatal conductance. M urundeuva and Cnidoscolus spp. can be considered the most sensitive species to drought as changes in those variables also led to the decline in net photosynthesis. The other species can be considered more tolerant to drought, since net photosynthesis did not suffer significant decrease despite the harmful effects of water deficit on transpiration and stomatal conductance.

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Published

2018-12-06

How to Cite

MESQUITA, A.C., DANTAS, B.F. and CAIRO, P.A.R., 2018. Ecophysiology of caatinga native species under semi-arid conditions . Bioscience Journal [online], vol. 34, no. 6, pp. 81–89. [Accessed26 November 2022]. DOI 10.14393/BJ-v34n6a2018-39889. Available from: https://seer.ufu.br/index.php/biosciencejournal/article/view/39889.

Issue

Section

Agricultural Sciences